Lanthanide Lanthanoid, also called Lanthanide
Answer:
Atomic radii vary in a predictable way across the periodic table. As can be seen in the figures below, the atomic radius increases from top to bottom in a group, and decreases from left to right across a period. Thus, helium is the smallest element, and francium is the largest.
Explanation:
Answer: it is high-pitched
It is low-pitched
Explanation:
